Answer: Barite---A
Explanation:
Barite is an important agent used as a weighting agent for drilling of oil and natural gases because of its properties of high density, low oil absorption, low hardness which makes it a perfect drilling fluid additive.
Nevada is known as a lead producer for the production of Barite and because of an increase in oil exploration, it has lead to an increased demand for this mineral because of its key importance in drilling.
